# NEW- Built-in PDF viewer# CHANGED- Canvas elements can export their content as an image blob using canvas.toBlob()- Startup performance improvements # DEVELOPER- Debugger now supports pausing on exceptions and hiding non-enumerable properties- Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)- There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)- Web Console CSS links now open in the Style Editor# HTML5- CSS @page is now supported- CSS viewport-percentage length units implemented (vh, vw, vmin and vmax)- CSS text-transform now supports full-width# FIXED- Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages - Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode - Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode